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plague is characterized by periodic disease outbreaks in rodent populations

plague is characterized by periodic disease outbreaks in rodent populations

标签: plague,is,characterized,by,per 浏览: 2
aircraft as it was spraying insecticide in order to help eliminate populations of possible disease causing mosquitoes

aircraft as it was spraying insecticide in order to help eliminate populations of possible disease causing mosquitoes

标签: aircraft,as,it,was,spraying,in 浏览: 1
these malaria control workers whod been spraying malathion to combat mosquito populations

these malaria control workers whod been spraying malathion to combat mosquito populations

标签: these,malaria,control,workers, 浏览: 1

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